#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import time

import tkinter

import tkinter.messagebox

from threading import Thread

def main():

class DownloadTaskHandler(Thread):

def run(self):

time.sleep(5)

tkinter.messagebox.showinfo('提示', '下载完成!')

# 启用下载按钮

button1.config(state=tkinter.NORMAL)

def download():

# 禁用下载按钮

button1.config(state=tkinter.DISABLED)

# 通过daemon参数将线程设置为守护线程(主程序退出就不再保留执行)

# 在线程中处理耗时间的下载任务

DownloadTaskHandler(daemon=True).start()

def show_about():

tkinter.messagebox.showinfo('关于', '作者: 123(v1.0)')

top = tkinter.Tk()

top.title('多线程')

top.geometry('400x400')

top.wm_attributes('-topmost', 1)

panel = tkinter.Frame(top)

button1 = tkinter.Button(panel, text='下载', command=download)

button1.pack(side='left')

button2 = tkinter.Button(panel, text='关于', command=show_about)

button2.pack(side='right')

panel.pack(side='bottom')

tkinter.mainloop()

if __name__ == '__main__':

main()